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Silica fume is a waste product created in the production process of metallic silicon, ferrosilicon and other silicon alloys in the electric arc furnace with or without heat recuperation of flue gasses. Microsilica as a waste hazardous to the environment after years of studies in laboratories and science institutes found its use in civil engineering. The utilization of silica fumes in civil engineering is mostly visible in the technology of high performance concretes (HPC). The examination of imposed thermal stress...